Which Technique Helps Team Presentations to Be More Seamless

Which technique helps team presentations to be more seamless?

A) working independently on research and writing up until the presentation
B) using transitional phrases to pass speaking roles from one to the next
C) keeping your head down when other team members are speaking to keep the focus on them
D) assigning team roles to people who need to improve in the particular skill that the task requires
E) avoiding reference to each other's names to present more of a team identity